Patents by Inventor James H. Shadowen

James H. Shadowen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Combustor
    Patent number: 5481867
    Abstract: An annular combustor for a gas turbine engine is constructed to include a sector that has a reduced airflow distribution than the remainder of the circumference by supplying a reduced airflow in a judiciously located portion of the fuel nozzles and the single stage of radially ingested combustion airflow. This single stage circumferential zoned annular combustor serves to accommodate higher fuel/air ratios.
    Type: Grant
    Filed: May 31, 1988
    Date of Patent: January 9, 1996
    Assignee: United Technologies Corporation
    Inventors: Thomas L. Dubell, James H. Shadowen
  • Combustor
    Patent number: 5297385
    Abstract: An annular combustor for a gas turbine engine includes a sector in the primary combustion zone that operates at a reduced level of airflow than the remaining portion of the combustor by providing fixed air openings in the dome or fuel nozzles and in the combustion air admission holes. This allows the combustor to operate at higher fuel/air ratios with a minimum of complexity in the hardware.
    Type: Grant
    Filed: May 31, 1988
    Date of Patent: March 29, 1994
    Assignee: United Technologies Corporation
    Inventors: Thomas L. Dubell, James H. Shadowen
  • Combustor fuel nozzle arrangement
    Patent number: 4991398
    Abstract: The fuel nozzles in the combustor of a gas turbine engine are concentrically disposed in two tiers about the circumference of the dome and are arranged in a triangular pattern with the air swirl orientation providing an increased intensity of combustion so as to enable a reduction in combustor size and weight while increasing temperature rise and the overall thrust-to-weight ratio of the engine.
    Type: Grant
    Filed: January 12, 1989
    Date of Patent: February 12, 1991
    Assignee: United Technologies Corporation
    Inventors: Jim A. Clark, James H. Shadowen, Thomas L. DuBell
  • Stepped diffuser
    Patent number: 4979361
    Abstract: The diffuser for delivering compressor discharge air to the combustor of a gas turbine engine includes a prediffuser mounted ahead of a dump diffuser which includes step changes in the flow path at its inlet and adjacent the cowl of the combustor in the passageway of the dump diffuser for providing at least two sudden expansions of the diffuser flow.
    Type: Grant
    Filed: July 13, 1989
    Date of Patent: December 25, 1990
    Assignee: United Technologies Corporation
    Inventors: Jim A. Clark, James H. Shadowen, Barton R. Field
  • Thrust augmentor having swirled flows for combustion stabilization
    Patent number: 4170109
    Abstract: A thrust augmentor for a turbofan, gas turbine engine is disclosed. Techniques for mixing and burning dissimilar density gases in a thrust augmentor are developed. In accordance with one specific teaching the flame front in a swirl augmentor is stabilized by a continuously operative pilot burner. The pilot burner is positioned in the radially outward portion of the augmentor.
    Type: Grant
    Filed: November 9, 1977
    Date of Patent: October 9, 1979
    Assignee: United Technologies Corporation
    Inventors: William J. Egan, Jr., Kurt J. Hanloser, James H. Shadowen
  • Thrust augmentor
    Patent number: 4170111
    Abstract: A thrust augmentor for a turbofan, gas turbine engine is disclosed. Techniques for mixing and burning dissimilar density gases in a thrust augmentor are developed. In accordance with one specific teaching the flame front in a swirl augmentor is stabilized by a continuously operative pilot burner. The pilot burner is positioned in the radially outward portion of the augmentor. The pilot burner employs fuel premixing techniques and is adapted to operate at low inlet pressure levels.
    Type: Grant
    Filed: November 9, 1977
    Date of Patent: October 9, 1979
    Assignee: United Technologies Corporation
    Inventors: George D. Lewis, James H. Shadowen